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Object processing employing movement
8126203 Object processing employing movement
Patent Drawings:Drawing: 8126203-10    Drawing: 8126203-11    Drawing: 8126203-3    Drawing: 8126203-4    Drawing: 8126203-5    Drawing: 8126203-6    Drawing: 8126203-7    Drawing: 8126203-8    Drawing: 8126203-9    
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(9 images)

Inventor: Rhoads, et al.
Date Issued: February 28, 2012
Application: 13/114,854
Filed: May 24, 2011
Inventors: Rhoads; Geoffrey B. (West Linn, OR)
Rodriguez; Tony F. (Portland, OR)
Bradley; Brett A. (Portland, OR)
Assignee: Digimarc Corporation (Beaverton, OR)
Primary Examiner: Akhavannik; Hadi
Assistant Examiner:
Attorney Or Agent:
U.S. Class: 382/100; 382/115; 713/176
Field Of Search: 382/100; 382/103
International Class: G06K 9/00
U.S Patent Documents:
Foreign Patent Documents: 2417592; WO9724699; WO02/065782; WO03/030105; WO2005088517; WO2005088533; WO2005/106783
Other References: Alp Vision Fingerprint press release, Sep. 25, 2006. cited by other.
Chen, "Certifying Authenticity via Fiber-Infused Paper," ACM SIGecom Exchanges, vol. 5, Issue 3, Apr. 2005, pp. 29-37. cited by other.
Deinhammer, "The Implication of Direct Laser Engraved Intaglio Plates on Banknote Security," SPIE vol. 6075, Feb. 2006. cited by other.
Matsumoto, "Evaluation Security of a Clone Preventive Technique," Optical Security and Counterfeit Deterrence Techniques III, Proc. of SPIE Co. 3973, 2000, pp. 139-152. cited by other.
Pappu, Physical One-Way Functions, Science, vol. 297, Sep. 2002, pp. 2026-2030. cited by other.
Pappu, "Physical One-Way Functions," MIT Thesis, Mar. 2001. cited by other.
Rodriguez, "On the Use of Mobile imaging Devices for the Validation of First- and Second-Line Security Features," SPIE vol. 6075, Feb. 2006. cited by other.
Van Renesse, "3DAS--A 3 Dimensional-Structure Authentication System," IEE European Convention on Security and Detection, 1995, pp. 45-49. cited by other.
Van Renesse, "Optical Inspection Techniques for Security Instrumentation," SPIE vol. 2659, pp. 159-167, 1996. cited by other.
Buchanan, Fingerprinting documents and packaging, Nature, vol. 436, p. 475, Jul. 28, 2005. cited by other.
Buchanan, Fingerprinting documents and packaging--supplementary methods, Nature online, Jul. 2005. cited by other.
Haist, Optical Detection of Random Features for High Security Applications, Optics Communications v. 147, pp, 173-179, 1998. cited by other.
Lindstrand, Angularly and Spatially Resolved Reflectometer for a Perceptually Adequate Characterization of Gloss, JIST vol. 49, Jan.-Feb. 2005, pp. 71-84. cited by other.
Pappu, Physical One-Way Functions, RSA Laboratories Cryptobytes, vol. 6, No. 2, Summer, 2003, pp. 21-32. cited by other.









Abstract: Directional albedo of a particular article, such as an identity card, is measured and stored. When the article is later presented, it can be confirmed to be the same particular article by re-measuring the albedo function, and checking for correspondence against the earlier-stored data. The re-measuring can be performed through use of a handheld optical device, such as a camera-equipped cell phone. The albedo function can serve as random key data in a variety of cryptographic applications. The function can be changed during the life of the article. A variety of other features are also detailed.
Claim: We claim:

1. A method comprising: causing relative movement between an object and a camera-equipped mobile phone; capturing plural successive images of the object from different viewpointsusing said camera-equipped mobile phone; and by reference to data thereby collected, making a determination concerning said object; wherein said determination is made independently of information about positioning of any illumination source relative tothe object.

2. The method of claim 1 wherein said object comprises an identity document.

3. The method of claim 1 that includes making a determination concerning identification of said object.

4. A method comprising: waving an article before a 2D optical sensor device along a random track; and by reference to data produced by said device, making a determination concerning said article; wherein said determination is madeindependently of information about positioning of any illumination source relative to the article.

5. A method comprising: causing relative movement between an identity card and a 2D optical sensor; capturing plural frames of image data during said movement, said frames including image data corresponding to said identity card; determiningrelative position data for each of plural frames; decoding a steganographically encoded data signal conveyed by said card; and processing said captured image data, in conjunction with said position data, to determine a physical function associated withsaid card; wherein said processing is done independently of information about positioning of any illumination source relative to the identity card.

6. The method of claim 5 that further comprises checking previously-stored physical function data with said determined physical function, for correspondence.

7. The method of claim 6 that includes, by reference to the decoded data signal, identifying a record in a database purportedly corresponding to said card, and obtaining said previously-stored physical function data therefrom.

8. The method of claim 5 wherein said determining position data proceeds by reference to a steganographically encoded reference signal conveyed by said card.

9. The method of claim 5 wherein said physical function has a directional aspect.

10. The method of claim 5 that further comprises checking previously-stored physical function data with said determined physical function, for correlation.

11. A method that includes: causing relative movement between an object and a 2D optical sensor; generating object-related data, said generating including capturing a frame of image data during said movement, said frame of image data includingat least some image data corresponding to said object, and determining relative position data associated with said captured frame of image data; sensing a machine-readable identifier from the object; accessing a remote data store containing dataassociated with said sensed identifier; and checking the data from said remote data store with said object-related data for correspondence; wherein said method proceeds independently of information about positioning of any illumination source relativeto the object.

12. The method of claim 11 that includes checking the data from said remote data store with said object-related data for correlation.

13. The method of claim 11 in which the object comprises an identity card.

14. The method of claim 11 in which said act of generating object-related data includes capturing plural frames of image data during said movement, and determining relative position data associated with each of said captured frames.

15. The method of claim 11 wherein said capturing a frame of image data comprises capturing with a 2D optical sensor in a camera-equipped telephone.

16. The method of claim 1 wherein said determination is made by a processor, configured in accordance with software instructions, and proceeds with reference to information related to surface topology of the object.

17. The method of claim 4 wherein said determination is made by a processor, configured in accordance with software instructions, and proceeds with reference to information related to surface topology of the article.

18. The method of claim 5 wherein said processing is performed by a processor, configured in accordance with software instructions, and proceeds with reference to information related to surface topology of the identity card.

19. The method of claim 11 wherein said generating is performed by a processor, configured in accordance with software instructions, and proceeds with reference to information related to surface topology of the object.

20. A computer readable medium containing non-transitory instructions for causing a process programmed thereby to perform the following acts: control the capturing of image data from an article; process the image data to obtain data relatingto positioning of the article; and make a determination concerning the authenticity of the article, independently of information about positioning of any illumination source relative to the article.

21. A method that includes: collecting plural frames of image data of an object, each with a different perspective; step for checking a match between said object to a reference object, through use of data stored in a data structure, andindependently of information about positioning of any illumination source relative to the article; and providing an indication to a user if a match is found.

22. The method of claim 21 wherein said step comprises performing a correlation operation using a computer.
Description:
 
 
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